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Finding the Fourth Proportional to 443,706.87, 665,560.32 and 405,215.67

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Solution

The fourth proportional to 443,706.87, 665,560.32 and 405,215.67 is: 607,823.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,706.87 : 665,560.32 = 405,215.67 : x
  2. Step 2: Convert to fraction form
    443,706.87/665,560.32 = 405,215.67/x
  3. Step 3: Cross multiply
    443,706.87x = 665,560.32 × 405,215.67
  4. Step 4: Simplify right side
    443,706.87x = 269,695,470,994.21
  5. Step 5: Solve for x
    x = 269,695,470,994.21/443,706.87
  6. Step 6: Final answer
    x = 607,823.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.